1997 E36 328 sport only made 213bhp max HELP!! - Page 3

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Thread: 1997 E36 328 sport only made 213bhp max HELP!!

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  1.  
    #21
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    mistreku's Car Details
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    you can alter the AFR via re-map, or FPR. or bigger injectors, but they will require a re-map as well.
     
     

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    #22
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    Do you know whether they corrected your readings allowing for ambient temperature ?
    24.5C is quite high, air would be less dense and effect your fuelling and power readings.
    2013, Porsche 911 Carrera 4S, PDK, Sports Exhaust, Chrono, etc, etc

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    #23
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    i used to be a member of 328life an american forum, what youve done was very popular there and they always claimed 230, where did you get you cams and how much, warm air dont help but these guys had that on dynos in california
     
     

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    #24
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    I'm no expert but that looks alright to me.
    The lumpy torque curve is probably down to the cams. It does richen up toward the top end nicely and around 180bhp at the wheels is pretty good. Mileage will play a part, but bear in mind that my lowly E46 323 (M52TU engine) made 180 at the wheels, so your graph is pretty good.
    If it bothers you that much then take it to another dyno and get it retested, at least you'll have another graph to compare it to.

    Before you look at bigger injectors or fuel pressure, get it monitored to see if the injectors are maxing out on duty. A lot of people change them without looking to see if they actually need to!!
     
     

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    #25
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    Quote Originally Posted by Egon View Post
    I'm no expert but that looks alright to me.
    The lumpy torque curve is probably down to the cams. It does richen up toward the top end nicely and around 180bhp at the wheels is pretty good. Mileage will play a part, but bear in mind that my lowly E46 323 (M52TU engine) made 180 at the wheels, so your graph is pretty good.
    If it bothers you that much then take it to another dyno and get it retested, at least you'll have another graph to compare it to.

    Before you look at bigger injectors or fuel pressure, get it monitored to see if the injectors are maxing out on duty. A lot of people change them without looking to see if they actually need to!!
    is it normal for BMW's to run that lean prior to 2k rpm's?.. does the ECU changed from open loop to closed loop operation at any time (i.e. past 2k rpms?)..

    * 2016 BMW M135i LCI (F20): current
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    #26
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    Having only looked at the AFR now it does look lean.

    Here is mine for comparison


    Get it re-tuned somewhere or have the tuner re-do it. There IS power there.
    I made 207 with a 12.5:1 AFR in the highest rpm´s, but I kept it at 206 as the added fuel only gives a hp and is sort of wasteful.

    Also 24C is not that bad. I have tuned in the winter time and summer time, and the variance is at most 10C which account for just about 1% difference.
     
     

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    #27
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    Quote Originally Posted by pangster View Post
    is it normal for BMW's to run that lean prior to 2k rpm's?.. does the ECU changed from open loop to closed loop operation at any time (i.e. past 2k rpms?)..
    they all run lean-ish until 3000rpm, maybe higher, but i think this one runs a bit too lean, at least imo. i think for best performance, the AFR should be somewhere around 12.5-13. if it's of any help, this is how my AFR used to look like in october:
    Attached Images
     
     

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  16.  
    #28
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    chaps will get an autolgic done sometime this week as see whats thrown up.

    if it turns out that i do have a duff sensor or 2 will the unichip need mapped again to adjust or will the new sensors etc make the correct adjustments for me?

    a bit surprised that nothing was thrown up when dyno'd to begin with if this is the case but don't think the Dastek dudes have autologic etc.
     
     

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    #29
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    You´ll need a retune no matter what.
     
     

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  19.  
    #30
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    who mapped it?

    I used to have a Skyline and different mappers can get different results, some achieved a lot more than others.

    You would hope that if there was a problem a decent garage would recomend what is needed to sort it
     
     

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